Changlong Sun

Partner/Patent Attorney/Attorney at Law

Practice Area:  Patent Invalidation/Patent Administrative litigation/Patent Infringement Litigation/Patent Retrieval/Patent Prosecution (mechanics)/Patent Strategy and Forewarning/ Contracts of Intellectual Property/ Intellectual property Consultancy

Tel: 86-10-59208888 Fax: 86-10-59208747 E-mail:   Office: Beijing

Professional Experience

Mr. Sun is dually qualified as Patent Attorney and Attorney at law. He joined Unitalen Beijing in 2004 and handled mainly patents cases involving patent prosecution, review and invalidation, patent civil litigations, patent administrative litigation, etc., including thousands of patent applications, hundreds of patent review and invalidation cases and several dozens of typical patent infringement litigations and patent administrative litigations. In particular, Mr. Sun has abundant practical experience in patent invalidation and patent civil litigations as well as patent administrative litigations. Clients and successful cases represented by him mainly include Dongfeng Yueda Kia's responding to car antenna patent infringement and invalidation cases lodged by Jiang Xiaoping, Daimler Benz's and Beijing Benz responding to auto parts patent infringement and invalidation case lodged by Ren Wenlin, US ICON suing Jinan Yibang and others for patent infringement and patent invalidation, Joyoung responding to soybean milk machine patent infringement lawsuits filed in South Korea, and UK TENSAR filing series of patent infringement, invalidation and administrative litigations.

Education Background

Northeast Forestry University , Bachelor of Engineering

Professional Qualification: 

Patent Law Subcommittee member of BEIJING LAWYERS ASSOCIATION

Working Language

Chinese English